Hoistiitg mechawism



0. HIVELY AND J., KLooS.

HOISTING MECHANISM.

. APPLICATION FILED 'JUNE 5,1917, 1, 11,124. l f Pmmedsept. 2,1919.

` 3 SHEETS-SHEET 2.

OSSIAN HIVELY AND JOI-IN KLOOS, CF ALLIANCE,

- v]1l\l'G'I1\TEIIRIII' G COMPANY, OF

Specification of Letters Patent.

ALLIANCE, OHIO.

` I-IOISTIN G- MECHANISM.

IatentedSept. 2, i919.A

' Application filed June e, 1917. serial No. 173,184.

. To ail whom t may concern:

Iio

speed as the other,

Be it'known that'we, OssIAN Hivnrar and J oHN KLoos, citizens of the United States, and residents of Alliance, in the county of Stark and State of Ohio, have invented certain ne'w and useful Improvements 1n HoistingMechanism; and we do hereby declare the following to `be a full,clear, and exact description'of 'the invention, such as' will enable others skilled in the art to which it appertains to make and use the same. n This invention relates to improvements 1n raising and lowering mechanism, and more particularly to such as may be employed on the trolley of a ladle or other crane and wherein intergeared and separately driven drums are employed.

rior to our invention, it has been proposed to operate each of two permanently intergeared drums by means of separate motors, buton account of the necessity of rotating the drums at the same speed, much diiiicultykand danger to the mechanism have been occasioned by reason of inabilityI to insure the running of one motor at the same and -the vfailure of the brakes and motors to operate simultaneously. In other words, it has been found difficult to effect such synchronism in the operation of the driving and controlling means for the two drums as will cause the accurate operation of the latter and without undue strain being brought upon the shaft bearings and the gearing. It is apparent-that should the .motors not operate synchronously, there will be a tendency of the gearing for one of the intergeared drums to crawl upon the other, with the result that undue strain will come upon the journals and tend to loosen or disrupt' the mountings for said journals or break some portion of the gearing. Inability to insure the necessary synchronisln in operation of the two mo torsand controlling means for the two intergeared drums may be due to any of various causes -For example, ineiicient or defective operation of the'electrie controllers for the motors circuits, may result in preventing the proper simultaneous operation ofthe two motors and brake devices. Again, the brake devices mayfail lto operate simuli taneously, or the brake shoesffmav become defective, and furthermore, the two motors 'ment of our invention; matical side 'and magnetic' brakes constitute v an important may not operate synchronously by reason of differences in internal or external resistance and lost motion.

The object of our vpresent invention is to overcome the difficulties -above mentioned, and to provide means which will` operate to compensate for any variance which may. occur between the simultaneous operation of the separate driving land controlling means for intergeared hoisting drums, whereby undue strain on the journal bearings and gear- 1n due to `such variance, shall be obviated.

ith this and other objects in view, the invention consists in certain novel features of construction and combination of parts as hereinafter 'set forth and-pointed out in the claims.

In the accompanying drawings; Figure l is a planview of la'crane trolley (the framework belng omitted) showing an embodi- Fig. 2 is a diagram-` elevation, partly in section, and Figs. 3, 4, 5, 6 and 7 are detail views.

1, 2 represent two drums on which suit-, able cables connected with the framework 3 of a ladle or other object, are wound in a4 manner which is well understood in the art.- These drums are permanently gearedV together by means of rim gears 4, 4 which may be located centrally between the ends of said drums. Separate electric motors 5-6 are provided for driving the respective drums through the medium may also be employed, as is usual in mechanism of this class. In the present instance, vided with gears 7, 8'respective'ly, the gear 7 being located at one end of the drum l and the gear 8 being located at the' opposite end of the drum 2. 'The gears 7, 8 receive motion from pinions 9V on shafts 10 and the latter receive motion through the medium of gears 11 and interposed ratchet devices 12 from pinions 13 and driven-shafts 14,-theY latter being provided with gears l5 receiving motion from pinions 1G on the armature shafts of the electric motors. Suitable magnetic brakes 1 7 may be connected with the driven shafts '14 for con` trolling the operation of the mechanism.

'Theratchet devices 12 interposed in the gearing between the motors and the drums,

` feaure of our inonio, Assrenons Tori-1E MORGAN the drums 1-2 are pro- V vention, whereby the curing of the defects and obvlatmg of the dangers incldent to the operation of prior hoisting mechanisms 'of the type to which our invention relates,'

5 are successfully accomplished, and these devices will now be explained in detail.

Each -gear l1 is made annular in form and is connected at one side with its hub 18 vby a web 19,-said hub being loosel y mounted on shaft 10 adjacent to the hub L0 of a spider 21. A bushing 22 is provided between the hub 18 and shaft and provided with a flange 23 disposed between the hubs l8and 20.

The gear 11 is'providedin its inner face with an annularseries of shoulders or ratchet teeth 24 and interposed beveled 'faces 25. The

members l1 thus constitute combined gears and ratchet wheels, and with the shoulders or teeth of the same, pawls 26, pivotally mounted on the spider or carrier 21 are adapted to coperate. In the present mstanc'e the wheel 11 is provided with an odd number of teeth, while an even number of pawls are provided', so that but one pawl 25 will engagea tooth-of the wheel at a time.

In order` that the slip of the wheel relaf tively to the pawl carrier or spider and the shaft to which the latter `is secured, shall be slight between the, disengagement of one .30 lpawl and the engagement of another pawl with a tooth of the wheel, we provide a number of ratchet teeth or shoulders 24 considerably in excess of the number of pawls employed. In the drawing, we have, shown nineteen teeth in the wheel 11 and .six pawls 26 on the carrier or spider 2K1, so that from the pawl which engages a tooth of the' wheel, the other pawls shall 'be successively increasing distances from the teeth with which 40 they are intended to coperate as 4clearly shown in Fig. 3. Each pivotedpawl 26 'is pressed outwardly toward the ratchet teeth or the inclined faces intervening between said teeth, by means of a spring 27. Each spring bears at its outer end against 'a shoulder 28 on one of the pawls and its inner portion is seated in an externally' threaded cup 29 which enters a .threaded socket inthe carrier or spider. By adjust- '50 ing the cup 29 in its socket, the tension of the spring may be properly adjusted. Each cup 29 is provided with a flanged outer end having notches30, any one of which may receive a lock 3l removably secured to the spider or carrier by a bolt 32 having a nut 33 thereon, and a pin 3l, and bythese means mthe tension cup may be securely held at any desired adjustment.

The web of the wheel 1l may be provided with openings 34 to tfacilitate assembling, adjustment and repair of the ratchet devices.

Vith the construction and arrangement of mechanism hereinbefore described, it will be apparent that should one of the motors tend-to drive/"its drum faster than the other drum is being driven by the other motor, from any of the causes hereinbefore mentioned, or should the-magnetic brakes fail to operate in synchronism, or should there be a tendency of one drum to rotate faster than the otherfrom any other cause, a slip will occur in the ratchet mechanism in one or the other of the wheels 11 and such tendency of unequal operati-on of the means which drive and control the two drums will thus be compensated for by -the said ratchet devices and any tendency of the gear of o ne drum to crawl upon or over the gear ofthe other drum' and the consequent tendency to tear one of the drums from its mountings or to break the intermeshing gears, will be obviated.

Various changesl might be made in the details of construction of our invention without departing from the' spirit thereof br limiting its scope, and hence we do not wish to restrict ourselves to the precise details herein set forth. i'

Having fully described our invention what 1 we claim as new and desire to secure by Letters-Patent, is

1. I n hoist mechanism, the combination with intergeared drums, a motor for eachl drum, and gearing interposed between said motors and the respective drums, of compensating means in said gearing.

2. In hoist mechanism, the combmatlon with intergeared drums, motors' separately geared to the respective drums, and compensating means interposed between each motor and the d rum which. it operates. y

3. In hoist mechanism, the combination with intergeared drums, a motor for each p drum, a gearing betweenthe respective motors and the respective drums, of compensating means constructed to permit slipping, in-` terposed in the gearing between the respective motors and drums.

4. In hoist mechanism, the combination `with intergeared drums, a separate motor for each drum, and'gearing interposed between the respective motors and drums, of ratchet devices interposed in the gearing between the respective motors and drums.

' 5. In hoisting mechanism, the combination of intergeared drums, a separate motor for each drum, and sets of gearing between the respective motors and drums, each set of gciring including a loose gear and ratchet devices between said loose gear and its shaft.

6. In hoisting mechanism, the combination of intergeared drums, a separate motor for each drum, and sets of gearing interposed between the respective motors and drums, each set of gearing including a Combined gear and ratchet wheel, a shaft on which said wheel is loosely mounted, a carrier secured to said shaft, and a plurality of pawls mounted on said earner and diiering in number With the number of teethof the ratchet wheel, whereby' one tooth at a time vwill engage the ratchet' Wheel.

'Z'. In hoisting mechanism, lthe combination of interg'ear'ed drums,v 'a separate motorr for each drum, and sets of` gearing interposed between the respective motors and drums, each set of gearing Vincluding a combined' gear and ratchet Wheel, a shaft on which said Wheel is, loosely mounted, 'a carrier secured to said shaft, and 'a plurality of spring pressed pawls mounted on said carrier,` the number of said pawls being con- ,V siderably less than thenumber ofl teeth of Vspecification in the the ratchet Wheel and so yarranged that a single pawl will engage the ratchet Wheel ata time and the other pawls disposed successvely greater distances from the ratchet teeth with which they may be brought into l coperation.

In testimony whereof We have signed thispresence of two subossIAN HIVELY'.- JoHN, iiLoos.

scrbing Witnesses. 

